KYIV, Ukraine >> A Russian rocket struck a village cafe and store in eastern Ukraine on Thursday, killing at least 51 civilians in one of the deadliest attacks in the war in months, according to President Volodymyr Zelenskyy and other top officials in Kyiv.

Zelenskyy, attending a summit of about 50 European leaders in Spain to drum up support from Ukraine’s allies, denounced the strike in the village of Hroza as a “demonstrably brutal Russian crime” and “a completely deliberate act of terrorism.”

About 60 people were in the cafe, attending a wake after a funeral, said Internal Affairs Minister Ihor Klymenko, who provided the death toll.

Among the dead was a 6-year-old boy, and seven other people were wounded, said presidential chief of staff Andrii Yermak and Kharkiv Gov. Oleh Syniehubov.

According to preliminary information from Kyiv, the village was hit by an Iskander missile. Emergency crews searched the smoldering rubble of damaged buildings. Ukrainian prosecutors released photos showing bloodied bodies.

Hroza, which had a population of about 500 before the war, is located in the northeastern Kharkiv region. The village and other parts of the region were seized by Russia early in the war and recaptured by Ukraine in September 2022.

The village is only 30 kilometers (19 miles) west of Kupiansk, a key focus of the Russian military effort. Zelenskyy had visited the area Tuesday to meet with troops and inspect equipment supplied by the West.

On Thursday, Zelenskyy was at a summit of the European Political Community in Granada, Spain, where he asked for more Western support, saying that “Russian terror must be stopped.”

“Russia needs this and similar terrorist attacks for only one thing: to make its genocidal aggression the new norm for the whole world,” he said in a statement posted on his Telegram channel. “Now we are talking with European leaders, in particular, about strengthening our air defense, strengthening our soldiers, giving our country protection from terror. And we will respond to the terrorists.”

“The key for us, especially before winter, is to strengthen air defense, and there is already a basis for new agreements with partners,” he told the group, which was formed in the wake of Russia’s full-scale invasion of Ukraine in February 2022.

Last winter, Russia targeted Ukraine’s energy system and other vital infrastructure in a steady barrage of missile and drone attacks, triggering continuous power outages across the country. Ukraine’s power system has shown a high degree of resilience and flexibility, helping alleviate the damage, but there have been concerns that Russia will again ramp up its strikes on power facilities as winter draws nearer.

Zelenskyy noted the Granada summit will also focus on “joint work for global food security and protection of freedom of navigation” in the Black Sea, where the Russian military has targeted Ukrainian ports after Moscow’s withdrawal from a U.N.-sponsored grain deal designed to ensure safe grain exports from the invaded country’s ports.

The U.K. Foreign Office cited intelligence suggesting that Russia may lay sea mines in the approach to Ukrainian ports to target civilian shipping and blame it on Ukraine.

“Russia almost certainly wants to avoid openly sinking civilian ships, instead falsely laying blame on Ukraine for any attacks against civilian vessels in the Black Sea,” it said, adding that the U.K. was working with Ukraine to help improve the safety of shipping.

Speaking in Granada, Zelenskyy emphasized the need to preserve the European unity in the face of Russian disinformation and to remain strong amid what he described as a “political storm” in the United States.

Asked if he was worried that support for Ukraine could falter in the U.S. Congress, the Ukrainian president stressed that his visit to Washington last month made him confident of strong backing by both the Biden administration and Congress.

Zelenskyy called for “additional air defense system for Ukraine, additional artillery and shells, additional long-range missiles and drones for our soldiers, as well as additional formats of support and security guarantees for nations threatened by Russia” to help protect Europe from potential aggression by Moscow.

Earlier Thursday, Russia targeted Ukraine’s southern regions with drones. Ukraine’s air force said that the country’s air defenses intercepted 24 out of 29 Iranian-made drones that Russia launched at the Odesa, Mykolaiv and Kirovohrad regions.

Andriy Raykovych, head of the Kirovohrad regional administration, said an infrastructure facility in the region was struck and emergency services were deployed to extinguish a fire, but there were no casualties.

In other Russian attacks in the past day, two civilians were killed by shelling in the southern city of Kherson and one died after a strike on the city of Krasnohorivka in the eastern Donetsk region. At least eight people were wounded, according to Ukraine’s presidential office.

A Russian strike on a hospital in the city of Beryslav in the Kherson region ravaged the building and wounded two medical workers, according to the regional administration chief, Oleksandr Prokudin.

Ukraine, in turn, has struck back at Russia with regular drone attacks across the border.

In Russia’s Kursk region that borders Ukraine, Gov. Roman Starovoit said that Ukrainian drones attacked infrastructure facilities in several areas, resulting in power cuts. He also said that Ukrainian forces fired artillery at the border town of Rylsk, wounding a resident and damaging several houses.